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## needhelpfastplease Group Title A student pushes a 40-N block across the floor for a distance of 10 m. How much work was applied to move the block? A. 4 J B. 40 J C. 400 J D. 4000 J 4 months ago 4 months ago

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1. timaashorty Group Title

I'm not 100% sure about this one but I would go with C.

2. kym02 Group Title

I think it's also C because work=force x distance.

3. theEric Group Title

Right! Because the force and displacement are in the same exact direction, you can use that formula.

4. needhelpfastplease Group Title

thanks everyone! You all are very helpful!

5. theEric Group Title

:) You're welcome! More generally, $$\large W=F\dot\ d\dot\ \cos(\theta)$$ where $$\theta$$ is the angle between force and displacement. You can see that, when they're in the same direction, $$\theta=0$$ $$\implies W=F\dot\ d\dot\ \cos(0)=F\dot\ d\dot\ 1=F\dot\ d$$